EP0068680B1 - Antibiotikum - Google Patents

Antibiotikum Download PDF

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Publication number
EP0068680B1
EP0068680B1 EP82302977A EP82302977A EP0068680B1 EP 0068680 B1 EP0068680 B1 EP 0068680B1 EP 82302977 A EP82302977 A EP 82302977A EP 82302977 A EP82302977 A EP 82302977A EP 0068680 B1 EP0068680 B1 EP 0068680B1
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EP
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Prior art keywords
pseudomonic acid
acid
pseudomonic
formula
process according
Prior art date
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Expired
Application number
EP82302977A
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English (en)
French (fr)
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EP0068680A1 (de
Inventor
Peter John O'hanlon
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Beecham Group PLC
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Beecham Group PLC
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    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
    • C12P17/00—Preparation of heterocyclic carbon compounds with only O, N, S, Se or Te as ring hetero atoms
    • C12P17/16—Preparation of heterocyclic carbon compounds with only O, N, S, Se or Te as ring hetero atoms containing two or more hetero rings
    • C12P17/162—Heterorings having oxygen atoms as the only ring heteroatoms, e.g. Lasalocid
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
    • A61P31/04—Antibacterial agents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P33/00—Antiparasitic agents
    • A61P33/02—Antiprotozoals, e.g. for leishmaniasis, trichomoniasis, toxoplasmosis
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
    • C12N1/20—Bacteria; Culture media therefor
    • C12N1/205—Bacterial isolates
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12R—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES C12C - C12Q, RELATING TO MICROORGANISMS
    • C12R2001/00—Microorganisms ; Processes using microorganisms
    • C12R2001/01—Bacteria or Actinomycetales ; using bacteria or Actinomycetales
    • C12R2001/38—Pseudomonas
    • C12R2001/39—Pseudomonas fluorescens

Definitions

  • the present invention relates to novel antibiotics having activity against bacteria and mycloplasma.
  • esters of monic acid A i.e., compounds of structure (II) wherein R is an ester- forming radical
  • esters wherein R is a C 2 - s alkenyl group optionally substituted, inter alia with a carboxy group, which have antibacterial activity It has now been found that a compound falling within the generic description of such esters, but not specifically disclosed in U. K. 1,587,059 has particular advantages not shared by the other compounds wherein R is a C 2-8 alkenyl group.
  • a process for producing "pseudomonic acid D of formula (III) or a salt or ester thereof comprises culturing an organism of Pseudomonas fluorescens capable of producing Pseudomonic acid D, recovering from the culture medium pseudomonic acid D of formula (III) and thereafter if desired forming a salt or ester thereof.
  • the compound of formula (III) has been named "pseudomonic acid D". It is known that the compound has the absolute stereochemistry shown in formula (III) above.
  • Salts and esters of pseudomonic acid D may be pharmaceutically acceptable but this is not essential.
  • Non-pharmaceutically acceptable salts and esters may be useful in separation and purification of pseudomonic acid D.
  • salts include metal salts, (e.g. aluminium, alkali metal salts such as sodium or potassium, and alkaline earth metal salts such as calcium or magnesium) and ammonium or substituted ammonium salts (e.g. those with lower alkylamines such as triethylamine, hydroxy-lower alkylamines such as 2-hydroxyethylamine, bis-(2-hydroxyethyl)-amine or tri-(2-hydroxyethyl)-amine, cycloakylamines such as bicyclohexylamine, or with procaine, dibenzylamine, N, N-dibenzykethylene- diamine, 1-ephenamine, N-ethyl-piperidine, N-benzyt-P-phenethyt-amine.dehydroabietyt-amine, N, N'-bis- dehydroabietylethylene-diamine, or bases of the pyridine type such as pyridine, collidine or quinoline).
  • Suitable esters are C 1 - 6 alkyl esters.
  • the preferred ester is the methyl ester.
  • Pseudomonic acid D is particularly advantageous in that it is produced by, and may be isolated from cultures of P. fluorescens (NCIB 10586).
  • NCIB 10586 P. fluorescens
  • the other compounds disclosed in U. K. 1,587,059 are, of course, all semi-synthetic antibiotics.
  • Pseudomonic acid D its salts and esters are preferably in crystalline form.
  • Salts and esters of Pseudomonic acid D may be produced by conventional methods.
  • the process of the invention is suitably carried out under conventional fermentation conditions, for instance as shown below in the Examples.
  • the culture medium is then acidified and the pseudomonic acids extracted by repeated solvent extractions.
  • the crude pseudomonic acids are then separated by hplc to afford pseudomonic acid D.
  • the details of the process are given in the Examples below.
  • a preferred organism of Pseudomonas fluorescens is NCIB 10586.
  • pseudomonic acid D is useful as an intermediate in producing other antibiotics.
  • the process of the present invention may comprise a further step for producing pseudomonic acid A, which step comprises hydrogenating pseudomonic acid D.
  • process of the present invention may comprise a further step for producing monic acid A, which step comprises hydrolysing pseudomonic acid D.
  • o Pseudomonic acid D is an active antibiotic and may be used in human and vetinary treatment.
  • a pharmaceutical composition comprising pseudomonic acid D or a pharmaceutically acceptable salt or ester thereof in association with a pharmaceutically acceptable carrier therefor.
  • Tablets and capsules for oral administration may be in unit dose presentation form, and may contain conventional excipients such as binding agents, for example syrup, acacia, gelatin, sorbitol, tragacanth, or polyvinyl-pyrrolidone; fillers, for example lactose, sugar, maize-starch, calcium phosphate, sorbitol or glycine; tabletting lubricants, for example magnesium stearate, talc, polyethylene glycol or silica; disintegrants, for example potato starch, or acceptable wetting agents such as sodium lauryl sulphate.
  • the tablets may be coated according to methods well known in normal pharmaceutical practice.
  • Oral liquid preparations may be in the form of, for example, aqueous or oily suspensions, solutions, emulsions, syrups or elixirs, or may be presented as a dry product for reconstitution with water or other suitable vehicle before use.
  • Such liquid preparations may contain conventional additives such as suspending agents, for example sorbitol, syrup, methyl cellulose, glucose syrup, gelatin hydrogenated edible fats; emulsifying agents, for example lecithin, sorbitan monooleate, or acacia; non-aqueous vehicles (which may include edible oils), for example almond oil, fractionated coconut oil, oily esters such as glycerine, propylene glycol, or ethyl alcohol; preservatives, for example methyl or propyl p-hydroxybenzonoate or sorbic acid, and if desired conventional flavouring or colouring agents.
  • suspending agents for example sorbitol, syrup, methyl cellulose, glucose syrup, gelatin hydrogenated edible fats
  • emulsifying agents for example lecithin, sorbitan monooleate, or acacia
  • non-aqueous vehicles which may include edible oils
  • almond oil fractionated coconut oil
  • oily esters such as glycerine, propy
  • Suppositories will contain conventional suppository bases, e.g. cocoa-butters or other glyceride.
  • fluid unit dosage forms are prepared utilizing the compound and a sterile vehicle.
  • the compound depending on the vehicle and concentration used, can either be suspended or dissolved in the vehicle.
  • the compound can be dissolved in water for injection and filter sterilized before filling into a suitable vial or ampoule and sealing.
  • adjuvants such as a local anaesthetic, preservative and buffering agents can be dissolved in the vehicle.
  • the composition can be frozen after filling into the vial and water removed under vacuum. The dry lypophilized powder is then sealed in the vial.
  • Parenteral suspensions are prepared in substantially the same manner except that the compound is suspended in the vehicle instead of being dissolved and sterilisation cannot be accomplished by filtration.
  • the compound can be sterilised by exposure to ethylene oxide before suspending in the sterile vehicle.
  • a surfactant or wetting agent is included in the composition to facilitate uniform distribution of the compounds.
  • compositions may contain from 0.1 % to 99% by weight, preferably from 10 to 60% by weight, of the active material, depending on the method of administration.
  • each unit will preferably contain from 50-500 mg, of the active ingredient.
  • the dosage as employed for adult human treatment will preferably range from 100 mg to 3 g, per day, for instance 250 mg to 2 g per day, depending on the route and frequency of administration.
  • pseudomonic acid D or a pharmaceutically acceptable salt or ester may be administered as part of the total dietery intake.
  • the amount of compound employed may be less than 1 % by weight of the diet and it preferably no more than 0.5% by weight.
  • the diet for animals may consist of normal feedstuffs to which the compound may be added or it may be added to a premix.
  • a suitable method for administration pseudomonic acid D or a pharmaceutically acceptable salt or ester thereof to animals is to include it in the drinking water provided for the animals.
  • concentration of the compound in the drinking water would be from about 5 to 500 pg/ml, for example 5 to 200 ⁇ g/ml.
  • pseudomonic acid D or a pharmaceutically acceptable salt or ester thereof would be administered at 1 mg/kg body weight per day to 50 mg/kg, especially 2.5 mg/kg to 25 mg/kg when given internally.
  • Strain NCIB 10586 was cultured on an agar slope and flooded with sterile water. A sample was added to the following seed stage medium:
  • the fermentation was carried out at 25°C for 48 hours.
  • Culture medium (1500 I) was partially clarified on a rotary pre-coat filter and further clarified by centrifugation giving clarified liquor (12851). This was acidified to pH 4.5 using hydrochloric acid (50%) and was extracted with methyl isobutyl ketone (MIBK; 300 I) by metering the liquor at 8 1 min -1 and solvant at 2 1 min -1 into an in-line static mixer.
  • MIBK methyl isobutyl ketone
  • the two phases were separated by centrifugation and the organic extract was extracted with sodium bicarbonate solution (2% w/v, 60 I) pre-adjusted to pH 3.2.
  • the phases were separated by centrifugation.
  • MIBK (12 I) was added to the aqueous extract and the aqueous phase was acidified to pH 4.5 using hydrochloric acid (50%).
  • the organic phase was separated, washed with deionised water (6 I), and then concentrated to 1.5 I.
  • the concentrate was dried with magnesium sulphate.
  • the magnesium sulphate was removed by filtration and n-heptane (760 ml) added to the dry solution. The mixture so produced was left to stand at 5°C for 12 hours.
  • the crude product so produced was dissolved in dry tetrahydrofuran (THF; 1.5 ml) and chromatographed in portions (200-250 ⁇ l) by high performance liquid chromography (hplc) using an Altex ultrasphere-octyl (250 mm x 10 mm) reverse column and eluting at a flow rate of 3 ml/min of ammonium acetate buffer (0.1M; pH 5.7): THF (3:1).
  • the pseudomonic acid D obtained was rechromatographed by hplc as above and the combined eleuents evaporated to remove the THF, then the aqueous solution was adjusted to pH 7 and washed with ethyl acetate.
  • the aqueous layer was acidified to pH 4 using hydrochloric (1 M) under a layer of ethyl acetate (25 ml) and the aqueous layer further extracted with ethyl acetate (3 x 25 ml).
  • the combined extracts were dried using magnesium sulphate and evaporated to yield pseudomonic acid D (30 mg).
  • Purified pseudomonic acid D was shown by high resolution mass spectroscopy to have a molecular weight of of 498.2860 indicating a molecular formula of C 26 H 42 0 9 , which is two hydrogen atoms less than that of pseudomonic acid A.
  • the 13 C and 1 H nmr spectra of pseudomonic acids A and D also indicated structural similarities.
  • the 13 C nmr spectrum of pseudomonic acid D contained all of the resonances associated with the epoxide-containing nucleus of pseudomonic acid A, i.e. carbons 1-17. However, in addition to the usual low field carbon resonances of C1, C2, C3 and C1', two further resonances at ⁇ c 131.4 and 128.4, which appeared as doublets in the off resonance spectrum, indicated the presence of a disubstituted carbon, carbon double bond in a nine carbon ester side chain. The presence of six methylene triplets in the off resonance spectrum also confirmed the absence of branching in the nonenomic acid side chain. The location of the double bond and the assignment of its geometry were determined by high resolution 250 MHz 1 Hnmr spectroscopy.
  • protons unassigned were those of the nonenoic acid side chain and consisted of a multiplet at ⁇ 5.45 for the two olefinic protons, a two proton triplet at ⁇ 4.08 and five two-proton multiplets at 6 2.40, 2.32, 2.02, 1.63 and 1.44.
  • pseudomonic acid D is, therefore, confirmed with trans 4' double bond present in the ester side chain.
  • Methyl pseudomonate D (0.136 g) was dissolved in N,N-dimethylformamide (4.5 ml) and diluted with phosphate buffer (0.05M, pH 7, 60 ml). Bakers yeast (5 g was added and the mixture stirred vigorously for 18h at room temperature. The yeast was removed by centrifugation and the aqueous layer acidified to pH 4 then extracted with ethyl acetate (4 x 25 ml). The combined extracts were dried (magnesium sulphate), evaporated to an oil (0.076 g) which was dissolved in methanol (1 ml) and treated with sodium bicarbonate (0.013 g) in water (1 ml). Evaporation to dryness gave sodium pseudomate D (0.076 g, 50%):

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  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • General Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Veterinary Medicine (AREA)
  • Genetics & Genomics (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Biotechnology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Microbiology (AREA)
  • General Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Public Health (AREA)
  • Tropical Medicine & Parasitology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Oncology (AREA)
  • Biomedical Technology (AREA)
  • Virology (AREA)
  • Communicable Diseases (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Plural Heterocyclic Compounds (AREA)

Claims (8)

1. Ein Verfahren zur Herstellung von Pseudomonsäure D der Formel (111)
Figure imgb0016
oder eines Salzes oder Esters derselben, welches Verfahren das Züchten eines Organismus der Gattung Pseudomonas fluorescens, der fähig ist Pseudomonsäure D zu bilden, das Gewinnen von Pseudomonsäure D der Formel (III) aus dem Kulturmedium und anschließend, falls erwünscht, das Bilden eines Salzes oder Esters derselben, unfaßt.
2. Ein Verfahren gemäß Anspruch 1, bei welchem der Organismus der Gattung Pseudomonas fluorescens, NCIB 10586 ist.
3. Ein Verfahren gemäß Anspruch 1 oder 2, welches Verfahren weiterhin das Hydrieren der erhaltenen Pseudomonsäure D der Formel (III), wei in Anspruch 1 definiert, zu Pseudomonsäure A der Formel
Figure imgb0017
unfaßt.
4. Ein Verfahren gemäß Anspruch 1 oder Anspruch 2, welches Verfahren weiterhin das Hydrolysieren der erhaltenen Pseudomonsäure D der Formel (111), wie in Anspruch 1 definiert, zu Monsäure A der Formel
Figure imgb0018
5. Ein Verfahren gemäß Anspruch 1, in welchem die Pseudomonsäure D in ein Alkalimetallsalz derselben umgewandelt wird.
6. Ein Verfahren gemäß Anspruch 7, in welchem das Alkalimetallsalz Natriumpseudomonat D ist.
7. Ein Verfahren gemäß Anspruch 1, in welchem Pseudomonsäure D in einen C1-6-Alkyester von Pseudomonsäure D umgewandelt wird.
8. Ein Verfahren gemäß Anspruch 7, in welchem der C1-6-Alkylester Methylseudomonat D ist.
EP82302977A 1981-06-20 1982-06-09 Antibiotikum Expired EP0068680B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8119111 1981-06-20
GB8119111 1981-06-20

Publications (2)

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EP0068680A1 EP0068680A1 (de) 1983-01-05
EP0068680B1 true EP0068680B1 (de) 1986-09-17

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JP (1) JPS5815973A (de)
DE (1) DE3273313D1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8313035D0 (en) * 1983-05-12 1983-06-15 Beecham Group Plc Compound
JPH0519119Y2 (de) * 1985-02-27 1993-05-20
WO2020180249A1 (en) * 2019-03-05 2020-09-10 Singapore Health Services Pte Ltd Therapy for dry eye (de) and meibomian gland dysfunction (mgd) based on the replacement of o-acyl-ω-hydroxy fatty acids (oahfa)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1587059A (en) * 1977-06-15 1981-03-25 Beecham Group Ltd Antibacterial compounds
GB2005680B (en) * 1977-09-30 1982-04-07 Beecham Group Ltd Isolation of organic acids

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DE3273313D1 (en) 1986-10-23
JPS5815973A (ja) 1983-01-29
EP0068680A1 (de) 1983-01-05

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